I built WhatSun because my solar home wasn't thinking.

My house has two solar arrays, three Powerwall 3s, and two Teslas. On paper, it should run itself. In practice, I was the one doing the thinking — checking the Tesla app at breakfast, guessing when to plug in the cars, watching good sunshine get exported to PG&E for about 5 cents a kilowatt-hour while I bought power back at 42.

The hardware was never the problem. The problem was that nothing connected the dots: the weather, the rates, the batteries, the cars, the day ahead. Every solar home is a small power plant, and most of them are running without an operator.

So I built one. Watson is WhatSun's energy advisor — named for the detective, because that's the job: notice what the numbers are hiding. Every morning Watson turns your solar forecast, your battery, your cars, and your rate plan into a plain-English plan. Advice first. Autopilot where you allow it. And every evening, a wrap that proves what the plan actually saved.

WhatSun is built in California, for NEM 3.0 and time-of-use homes. No homelab, no rules to write, no dashboards to babysit. Just a home that thinks — and an advisor who tells you what it's thinking.

— Jason Boudreault, founder